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Gradient measuring instrument
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Lifting device for side ditch block
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Suspender
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Lifting and turning device
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Inclination measuring device
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Block hang-up device
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Suspension hook device
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Straight light beam generator attached to level
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Level and arranging method for pipe material
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Void pipe removing tool
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Block sling apparatus
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Manually holding type hoisting device
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Sling fitting
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Level
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Internal suspension wide type block hoisting accessory
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Large block hoisting tool
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Support base for laser beam irradiation device, and reference marking method by laser beam irradiation
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Continuously provided cover plate construction for covered u-shaped groove
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Hoist tool for concrete product and the like
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Light-projecting gradient meter
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